Twentieth century America witnessed a number of consequential migrations, Great Migrations, that helped reshape culture, politics, or economic structures. Here are eighteen interactive maps and charts that help us visualize some of the major migrations. Based on IPUMS-USA census samples, they were created by James Gregory, Professor of History, University of Washington, using Tableau Public.

Here are six interactive maps and charts that show the numbers of African American migrants leaving the South, the states and cities where they settled, and their states of origin for each decade 1900 to 2000. Filters allow you to select particular states, birth states, and years.

The relocation to California of close to 400,000 Oklahomans, Texans, Arkansans, and Missourians during the Great Depression was the most publicized mass migration of that decade. Three interactive maps show various dimensions of the Dust Bowl migration.

Here are charts and tables showing who moved to each state and who left each state. Using birthplace information, we track decade-by-decade the population origins of California, Florida, Texas, Illinois, New York, Hawaii, and every other state, showing countries of birth and states of birth. Secondly, we show where people from each state settled, how many stayed and how many left.